Furnace grate



J. MURDO.

FURNACE GRATE.

APPLICATION min Fig. 16, 1920.

- Patented Apr 18, 1922.

desired. 7 I

The object of .myinvention is to provide- UmrEe I stares narrate-Fries.

OHANNA M13330,- or' MmnEAroLIs, M NESOT 1 r FURNACE GRATE.

T 0 all whom it may concern.

Be it known that I, J OHANNA MURDo, a citizen of the United States,resident of Minneapolis, county of Hennepin, State of Minnesota, haveinvented certain new and useful Improvements in Furnace Grates, of whichthe following is a specification.

My invention relates'to. a grate and may be utilized in a furnace,boiler or stove, as

for better combustion, of the fuel byintroducing currents of air upthrough the body of the fuel and preventing it from packing down in amass in the center of the grate, as usual in furnaces as ordinarilyconstructed. A further object is to provide a grate which will not inany way interfere with shaking the fire or removing the ashes.

Other objects of the invention will appear from the following detaileddescription.

In the accompanying drawings forming part of this specification,

Figure 1 1s a vertical sectional view through the lower portion of thefurnace and fire-pot, showing my invention applied thereto, Y

Figure 2 is a plan view of the cone grate removed from the furnace,

Figure 3 is a sectional view on the line 33 of Figure 2, I

Figure 4 is a plan view of the rack or stand upon which the cone sectionof the grate is mounted.

Figure 5 is a side elevation of the supporting rack or stand for thecone section of the grate.

In the drawing, 2 represents the fire-pot of the furnace, 3 thecombustion chamber, 4 a base supporting the fire-pot, 5 the ash pit and6 a grate that is supported and locked in the usual Way above theashpit. 7 .is the usual jacket enclosing the furnace. 8 is a cone madepreferably of a series of vertically divided sections fitting togetherto form a conical gratesection and provided with vertically arrangedribs 9 with recesses between them having'slots 10 in the bottoms of therecessesleading to the space within-and below the cone. These slotsextend to a point near the top of the cone for the purpose ofintroducing air through the 'walls of the cone at a point near the topof the body of fuel in the fire-pot. 'I prefer also-to provide ports 10in the top of each section of the clear ofclinkers, slate and the like,by the cone to aid in the grate; V p Thecone is hollow, open at. thebottom,

and fits within a circular openingllthatis centrally arranged in thegrate6.i The lower wallsof the cone are provided with an an.- nular rib12 forming a recess 13 that is adapted to receive a correspondinglyshaped rib 14 formed on a ring 15 that is'supported inthe upper part ofthe ashpit by a series of .suitable' legs 16. This ring and; the supinsertion of a poker, or other suitable in strument, through the slots.i

' Specification of Letters Patent.) Patented ApfljS, x

Application filed February 16, 1920. serial No. 359,047. v

the circulation of air through- If desired at any time, the sections ofthe cone may be separated to allow an unusually large clinker or pieceof slate or stone to be discharged into the ashpit beneath.

As heretofore stated, the cone is normally stationary, the graterockingaround it and the body of fire lying on the walls of the conewillreceivethe currents of air direct from the ashpit and will promote the rapidand thorough combustion of the material resting on thecone. V In caseone of the cone sections should become broken-or burn out, it can beremoved and a new section substitutedtherefor.

The cone may be made in various sizes to fit different styles and typesof furnaces and may be also adapted foruse with a coal burning stove, ifdesired.

I claim as my invention: 1.The combination, with "a firepot and ashpitand a grate'having a central opening supporte'd above the ashpit, of ahollow, cone fitting within the opening in said grate and projectingupwardly into the body of fuel,

saidcone having a plurality of corrugations therein and slots in saidcorrugations eX- tending from the lower portion of the cone to pointsnear the top thereof, and a ring v I 1 arranged adjacent the opening insaid grate andv having legs resting uponithe' bottom of the ashpit, theupper portion of saidring forming a seat for the base of said cone. 2;The combination, with a firepot and ashpit and a grate having a centralopening supported above the ashpit, of a hollow cone fitting within theopeningin the grate and projecting upwardly into the body of fuel andcomposed of a plurality of vertically separable sections said conehaving a pln: rality of vertical corrugations therein and slots in thebottoms of said corrugations extending continuously from points neanthelower end of said cone to points near the 'upperendthereof, said conehaving afianged sections. having vertical corrugations therein andlongitudinal slots in the bottoms of said corrugations extendingcontinuously from points near the lower end of said cone to points nearthe upper end thereof, a ring arranged in the ashpit beneath the openingin said grate and supporting said cone and means for supporting saidring.

.4. The combination, with a fire-pot and ashpit and a. grate ringfitting within said firepot and having a comparatively large centralopening therein extending outwardly to points near the wall of saidfire-pot, of a hollow cone-having abroad base fitting within saidopening and depending therethrough, saidcone being composed ofvertically separable sections, each having 1011- 7 gitudinal slotstherein, a ring supported beneath the opening 1n said grateand havmg aseat for the base'of said cone, and

means supporting said ring beneath said grate;

In witness whereof, I have hereunto set myhand thislOth day of February,1920.

JOHANNA MURDo.

